7-8.1=

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Solution for 7-8.1= equation: 


Simplifying
7 + -8.1 = 0

Combine like terms: 7 + -8.1 = -1.1
-1.1 = 0

Solving
-1.1 = 0

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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